Good luck comes with it. What's the next sentence?

This sentence is "good luck always accompanies".

"Good luck is with you" means that good luck will always be with you, no matter where you go or what you do, there will be good luck.

"Good luck is always with you" more directly expresses the expectation of good luck, which means that I hope good luck will always be with you and never give up.

So these two sentences are related in meaning, and both express the pursuit and wish for good luck.